Update gophercloud vendor dependency to v0.1.0

vendor/github.com/gophercloud/gophercloud/errors.go

@@ -122,6 +122,11 @@ type ErrDefault408 struct {
 	ErrUnexpectedResponseCode
 }
 
+// ErrDefault409 is the default error type returned on a 409 HTTP response code.
+type ErrDefault409 struct {
+	ErrUnexpectedResponseCode
+}
+
 // ErrDefault429 is the default error type returned on a 429 HTTP response code.
 type ErrDefault429 struct {
 	ErrUnexpectedResponseCode
@@ -211,6 +216,12 @@ type Err408er interface {
 	Error408(ErrUnexpectedResponseCode) error
 }
 
+// Err409er is the interface resource error types implement to override the error message
+// from a 409 error.
+type Err409er interface {
+	Error409(ErrUnexpectedResponseCode) error
+}
+
 // Err429er is the interface resource error types implement to override the error message
 // from a 429 error.
 type Err429er interface {